Help With Downloader-acv

I have McAfee and it has told me that I have a downloader acv trojan on my computer. I followed the advice in a previous thread from someone named " kerenza" who had a similar probelm. But I'm still confused. I hope someone can help me and be able to explain it in dummy terms. I would greatly appreciate it.

Thank you sooo much. I printed out the HJT intructions but the only part I am confused on is when you say to transfer the text (from between the dotted lines in your referred post to between these dottied lines.

Can you please explain that to me. I'm really sorry I have been trying to figure it out and I know you don't like dumb questions.

The post you need to Read: Only use... also has some dotted lines
...................................................................... .............................
TRANSFER THE TEXT (from between the dotted lines in YOUR referred post) to BETWEEN THESE dotted LINES
...................................................................... .............................

Now put your own lines, or as in this example:
/R/ whatever...
/P/ whatever...
between the dotted lines of the Read: post so that it looks like:

Next, run a HJT Scan and (if still there) place a Tick-mark in the little square before: (Tick every line from the transfer!)
...................................................................... .............................
/R/ whatever...
/P/ whatever...
...................................................................... .............................
Now click on the Fix Checked button in HJT. Exit HJT.

FIX means put a check-mark before that line, so that Fix Checked can fix the checked lines.